Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 6: Metal Substrates: Clean Surfaces

O 6.3: Vortrag

Montag, 25. Februar 2008, 11:45–12:00, MA 005

Relaxations at the Ag(001) surface: A LEED study — •Michael Huth, Wolfram Münchgesang, Karl-Michael Schindler, and Wolf Widdra — Martin-Luther Universität Halle-Wittenberg, Institut für Physik, Halle, Deutschland

For low-energy electron diffraction a new approach of data recording and postprocessing has been developed. The improved I(V) curves for Ag(001) show low intensity features and additional fine structure of high intensity peaks. By comparing experimental and calculated I(V) curves significant relaxations of the top two layer distances have been determined. The relaxations found basically confirm recent theoretical predictions [1]. Detailed analysis shows that I(V) curves exhibit a strong dependence on the angle of incidence and show that small deviations from normal incidence can remove essential structures from the I(V) curves.

[1] J.-M. Zhang, Y. Shu, K.-W. Xu, Sol. Stat. Comm. 137 (2006) 441